How to fix W: Duplicate sources.list entry http://apt.newrelic.com/debian/ newrelic/non-free amd64 Packages (/var/lib/apt/lists/apt.newrelic.com_debian_dists_newrelic_non-free_binary-amd64_Packages)

How to fix this error ?

W: Duplicate sources.list entry http://apt.newrelic.com/debian/ newrelic/non-free amd64 Packages (/var/lib/apt/lists/apt.newrelic.com_debian_dists_newrelic_non-free_binary-amd64_Packages)

This comes on my hosting once you typed in apt-get update.

The resolution is pretty simple if you know where to look to for and they don’t make it easy.

Instead of navigating to

$cd /etc/apt/

you need to navigate to:

# cd /etc/apt/sources.list.d/ and edit newrelic file

it might just simpler to type:

$vim /etc/apt/sources.list.d/newrelic.list

and edit to file from:

deb http://apt.newrelic.com/debian newrelic non-free

deb http://apt.newrelic.com/debian newrelic non-free

So you need to remove one line and run apt-get update again.

Problem solved!

Or simply you can use this command to find where it is

grep -rnw /etc/ -e “deb http://apt.newrelic.com/debian”
/etc/apt/sources.list.d/newrelic.list:1:deb http://apt.newrelic.com/debian/ newrelic non-free

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